PRIMITIVE NEUROEPITHELIAL NEOPLASMS
\pɹˈɪmɪtˌɪv njˌuːɹə͡ʊpɪθˈɛlɪəl nˈiːə͡ʊplˌazəmz], \pɹˈɪmɪtˌɪv njˌuːɹəʊpɪθˈɛlɪəl nˈiːəʊplˌazəmz], \p_ɹ_ˈɪ_m_ɪ_t_ˌɪ_v n_j_ˌuː_ɹ_əʊ_p_ɪ_θ_ˈɛ_l_ɪ__ə_l n_ˈiː__əʊ_p_l_ˌa_z_ə_m_z]\
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A group of malignant tumors of the nervous system that feature primitive cells with elements of neuronal and/or glial differentiation. Use of this term is limited by some authors to central nervous system tumors and others include neoplasms of similar origin which arise extracranially (i.e., NEUROECTODERMAL TUMOR, PRIMITIVE, PERIPHERAL). This term is also occasionally used as a synonym for MEDULLOBLASTOMA. In general, these tumors arise in the first decade of life and tend to be highly malignant. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2059)
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Word of the day
tinctura quininae ammoniata
- A preparation made by dissolving quinin sulphate in alcohol [Br. Ph.].